Adjustable die-stock.



PATENTED JUNE 4, 1907.

B. BURDEN; ADJUSTABLE DIE STOCK.

APPLICATION FILED OCT. 31, 1905.

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B. BURDEN, ADJUSTABLE DIE STOCK.

APPLICATION FILED OOT.31, 1905.

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UNITED STATES PATENT EroE.

BRADFORD BORDFN, OF lVARRE-N, OHIO, ASSIGNOR TO THE BORDEN COMPANY, OFWVARREN, OHIO, A CORPORATION OF OHIO.

ADJUSTABLE DIE-STOCK.

Specification of Letters Patent.

PatentedJune 4:, 1907.

Application filed October 31,1905. Serial No. 285,324.

To all whom it natty concern:

Be it known that I, BRADFORD BORDEN, of WVarren, in the county ofTrumbull and State of Ohio, have invented certain new and usefulImprovements in Adjustable Die- Stocks; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

The primary object of my present invention is to enable pipes to bepresented and threaded from the front or rear of a diestock. This Iaccomplish by making each of the dies reversible face for face.

A further object is to avoid any of the thrust in cutting being thrownupon the tongues of the adjuster which extend into the grooves of thedie-blocks. This I accomplish by having the full width of each die blockbear directly against the sides of the adjuster.

The invention will be hereinafter fully set forth and particularlypointed out in the claims.

In the accompanying drawings, Figure 1 is an elevation, with the dieblocks in position for cutting from the rear. Fig. 2 is a sectional viewon line 22, Fig. 1. Fig. 3 is a similar view with the die blocksreversed, that is, for cutting from the front. Fig. 4 is a view inperspective of one of the dieblocks.

Referring to the drawings, 1 designates the housing having an open frontand straight end walls 2 between which and between upper and lower walls3 and 4 are located dieblocks 5 inclined toward each other along theirside walls so .as to conform to the correspondingly inclined faces ofthe side members of the free sliding adjuster 6. The side members of thelatter are connected by a portion 7 wherein is mounted a set screw 8,all as pointed out in Letters Patent No. 744,465, issued to me November17, 1903.

The die-blocks are formed in both their inner and outer faces withcorresponding grooves 9 to accommodate tongues 10 of the overlappingportions of the side members of the adjuster, such tongues effecting themovements of the dies as the adjuster is actuated. Heretofore, as inaccordance with the means pointed out in my Letters Patent No. 817,217,dated April 10, 1906, to enable the threading to be performed on a pipepresented from the front instead of from the rear of the stock, theadjuster as well as the die-blocks themselves were bodily reversed.

The die blocks being then deprived of the bearing accorded by theoverhanging portions of the adjuster it was necessary to em ployadditional means to retain them as against outward thrust. But by meansof my present invention the adjuster always maintains the same positionrelatively to the die-blocks, that is to say, with its overlappingportions extended over the outer faces of the latter. Thumb nuts 13working on threaded rods 14 serve to retain the adjuster so as toprevent any outward deflection thereof.

In threading a pipe presented from the rear, in the customary manner,such pipe is centered by the work guide 15 at the rear of the housing,but when it is desired to change the device so as to enable a thread tobe cut on a pipe or bolt of insufficient length to be presented to thedies through the work guide, it is only necessary to move the adjusteroutwardly sufficiently to free the die blocks, and to allow the latterto be reversed face for face, each being transferred to the placepreviously occupied by the other. Then the pipe may be presented to thedies from the front. So as not to impair the strength of the die-blocksthe grooves therein are not formed as deep as heretofore, and inconsequence the overhanging portion of each side member of the adjusterwill stand outwardly a short distance from the face of the adjacentdie-block instead of being flush therewith. In consequence of thegrooves in the face of the die-blocks being of less depth thanheretofore, and such die-blocks not being cut away to accommodate theoverlapping portions of the adjuster, the full width of the sides of thedie-blocks will bear firmly against the side members of the adjuster soas to thereby take up all side thrust, leaving the at one side thereof,of sectional dies Within the housing constructed and arranged to bereversed face for face to enable the threading to be done from the frontor rear of the housing, and a free sliding adjuster for said dies fittedWithin said housing and having means for engaging either face of eachdie to effect the adjustment thereof by thesliding of the adjuster.

2. The combination with a die-stock having an open-front housing, and awork-guide at one side thereof, of sectional dies within the housing,said dies being reversible face for face, and having correspondinggrooves in their inner and outer faces, and an adjuster having portionsoverlapping the dies provided with tongues for fitting the outer groovesthereof.

3. The combination with a die stock having an open front housing havingWalls, dies slidable between the walls, a work-guide at the rear side ofthe die stock, a free sliding adjuster fitted in the housing, therebeing engaging connections between the dies and the adjuster arranged tocause adjustment of the former, and the engaging-parts of the dies beingsymmetrically arranged, whereby the dies may be reversed, face for face,to enable the threading to be done from the front or rear of thehousing. 4. The combination with a die-stock hav ing an open-fronthousing, and a Work-guide at one side thereof, of sectional dies withinthe housing capable of being reversed face for face to enable thethreading to be done from the front or rear of the housing, each diehaving a groove in each of its faces, and an adjuster for said dieshaving side members fitted between the dies and the end walls of thehousing and also having overlappingportions extended over the faces ofthe dies, said overlapping portions carrying tonguesfitting in saidgrooves for adjusting the dies, the latter at their sides bearingagainst the said side members of the adjuster, all side thrust beingtaken up by the said side members.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

BRADFORD BORDEN.

Witnesses:

WM. 1. 801mm, FRANK S. OHRYST.

